The probability of getting 4 heads in a row when flipping a fair coin is 1/16 or 6.25%. This is because the probability of getting a head on each flip is 1/2, and the probability of independent events occurring together is found by multiplying their individual probabilities.
The probability of getting at least 1 tails when flipping 4 coins is 15/16 or 93.75%. This is because the only way to not get at least 1 tails is if all 4 coins land on heads, which has a probability of 1/16. Therefore, the probability of getting at least 1 tails is 1 - 1/16 = 15/16.
There are 16 possible outcomes when flipping a fair coin 4 times. This can be found by multiplying the number of possible outcomes for each flip, which is 2, by the number of flips, which is 4.
The expected number of heads when flipping a fair coin 4 times is 2. This can be found by multiplying the probability of getting a head on each flip, which is 1/2, by the number of flips, which is 4.
If the coin is not fair, the probability of getting 4 heads will change depending on the bias of the coin. For example, if the coin is biased to land on heads 60% of the time, the probability of getting 4 heads in a row would be (0.6)^4 or 0.1296, which is significantly higher than the probability of getting 4 heads with a fair coin.